Java Beginners

Which of the following data types can be used as the controlling expression in a switch statement in Java?

• int

• char

• String

• All of the above

What happens if a break statement is omitted in a case block of a switch statement?

• The switch statement continues to the next case block.

• The switch statement exits the switch block.

• The switch statement generates a compilation error.

• The behavior is undefined.

Which of the following statements is true about fall-through behavior in a switch statement?

• Fall-through behavior is an error in Java switch statements.

• Fall-through behavior allows the execution of multiple case blocks sequentially until a break statement is encountered.

• Fall-through behavior is only allowed in switch statements with a default case.

• Fall-through behavior is the default behavior of a switch statement.

Which of the following statements is true regarding the use of switch statements with String objects in Java?

• Switch statements with String objects are not allowed in Java.

• Switch statements with String objects can only be used with constant expressions.

• Switch statements with String objects are supported in Java starting from version 7.

• Switch statements with String objects are less efficient than using if-else statements.

Which of the following is NOT a valid use case for a switch statement in Java?

• Menu selection in a command-line application

• Evaluating complex conditions based on user input

• Handling different HTTP methods in a web server

• Implementing a state machine

Which method is the entry point of any Java program?

• init()

• start()

• main()

• run()

How do you print "Hello, World!" in Java?

• System.out.print("Hello, World!");

• System.print("Hello, Word!");

• System.out.println("Hello, World!")

• System.write(Hello, World!");

What is the output of the following code snippet?

   

double num = 10 / 3;  

System.out.println(num);     

• 3.3333333333333335

• 3.0

• 3

• compilation error

What is the purpose of using the char data type in Java?

• To represent floating-point numbers.

• To represent single characters.

• To represent true or false values.

• To represent large integers.

Which operator is used to compare two values for equality in Java?

• =

• ==

• equals()

• !=